the controversy started when Kaepernick kneel’d during the nation anthem in 2016 in his last year of playing in the NFL before his contract was up. he did for the social injustice and racial injustice. they didn’t resign him after

he was just in an ad with Nike were a lot of controversy was sparked a lot people don’t like the idea that kneel’d during the national anthem. others think he did it for the right reasons. people have been burning there Nike apparel and shoes just because of this ad.
his first amendment was violated because he was doing it peacefully without hurting anyone he did make a scene or anything he simply kneel’d. his was quite and calm. he didn’t go on rampage